Caffeine content of specialty coffees
- PMID: 14607010
- DOI: 10.1093/jat/27.7.520
Caffeine content of specialty coffees
Abstract
Caffeine is the world's most widely consumed drug with its main source found in coffee. We evaluated the caffeine content of caffeinated and decaffeinated specialty coffee samples obtained from coffee shops. Caffeine was isolated from the coffee by liquid-liquid extraction and analyzed by gas chromatography with nitrogen-phosphorus detection. In this study, the coffees sold as decaffeinated were found to have caffeine concentrations less than 17.7 mg/dose. There was a wide range in caffeine content present in caffeinated coffees ranging from 58 to 259 mg/dose. The mean (SD) caffeine content of the brewed specialty coffees was 188 (36) mg for a 16-oz cup. Another notable find is the wide range of caffeine concentrations (259-564 mg/dose) in the same coffee beverage obtained from the same outlet on six consecutive days.
Similar articles
-
Caffeine content of decaffeinated coffee.J Anal Toxicol. 2006 Oct;30(8):611-3. doi: 10.1093/jat/30.8.611. J Anal Toxicol. 2006. PMID: 17132260
-
An examination of consumer exposure to caffeine from retail coffee outlets.Food Chem Toxicol. 2007 Sep;45(9):1588-92. doi: 10.1016/j.fct.2007.02.020. Epub 2007 Feb 23. Food Chem Toxicol. 2007. PMID: 17412475
-
Caffeine content of brewed teas.J Anal Toxicol. 2008 Oct;32(8):702-4. doi: 10.1093/jat/32.8.702. J Anal Toxicol. 2008. PMID: 19007524
-
Is Coffee a Useful Source of Caffeine Preexercise?Int J Sport Nutr Exerc Metab. 2019 Oct 17:1-14. doi: 10.1123/ijsnem.2019-0092. Online ahead of print. Int J Sport Nutr Exerc Metab. 2019. PMID: 31629349 Review.
-
Caffeinated and decaffeinated coffee consumption and melanoma risk: a dose-response meta-analysis of prospective cohort studies.Int J Food Sci Nutr. 2018 Jun;69(4):417-426. doi: 10.1080/09637486.2017.1373752. Epub 2017 Sep 11. Int J Food Sci Nutr. 2018. PMID: 28891369 Review.
Cited by 39 articles
-
Extraction-Free, Direct Determination of Caffeine in Microliter Volumes of Beverages by Thermal Desorption-Gas Chromatography Mass Spectrometry.Int J Anal Chem. 2020 Apr 1;2020:5405184. doi: 10.1155/2020/5405184. eCollection 2020. Int J Anal Chem. 2020. PMID: 32308685 Free PMC article.
-
Caffeine Consumption in Switzerland: Results from the First National Nutrition Survey MenuCH.Nutrients. 2019 Dec 20;12(1):28. doi: 10.3390/nu12010028. Nutrients. 2019. PMID: 31877632 Free PMC article.
-
Intermittent Nonhabitual Coffee Consumption and Risk of Atrial Fibrillation: The Multi-Ethnic Study of Atherosclerosis.J Atr Fibrillation. 2019 Jun 30;12(1):2205. doi: 10.4022/jafib.2205. eCollection 2019 Jun. J Atr Fibrillation. 2019. PMID: 31687073 Free PMC article.
-
Bioassay for Determining the Concentrations of Caffeine and Individual Methylxanthines in Complex Samples.Appl Environ Microbiol. 2019 Nov 14;85(23):e01965-19. doi: 10.1128/AEM.01965-19. Print 2019 Dec 1. Appl Environ Microbiol. 2019. PMID: 31540989 Free PMC article.
-
Gender Differences in Any-Source Caffeine and Energy Drink Use and Associated Adverse Health Behaviors.J Caffeine Adenosine Res. 2019 Mar 1;9(1):12-19. doi: 10.1089/caff.2018.0008. Epub 2019 Mar 14. J Caffeine Adenosine Res. 2019. PMID: 30944911 Free PMC article.
MeSH terms
Substances
LinkOut - more resources
-
Full Text Sources
-
Other Literature Sources
-
Medical